121248280 has 32 divisors (see below), whose sum is σ = 274332240. Its totient is φ = 48228480.

The previous prime is 121248271. The next prime is 121248287. The reversal of 121248280 is 82842121.

It is a super-2 number, since 2×121248280² = 29402290805916800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121248287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134 + ... + 15613.

Almost surely, 2^121248280 is an apocalyptic number.

121248280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121248280 is an abundant number, since it is smaller than the sum of its proper divisors (153083960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121248280 is a wasteful number, since it uses less digits than its factorization.

121248280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16939 (or 16935 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 121248280 is about 11011.2796713189. The cubic root of 121248280 is about 494.9468092354.

The spelling of 121248280 in words is "one hundred twenty-one million, two hundred forty-eight thousand, two hundred eighty".